JP2014135725A - Display device, spectacle device, display method and operation method of spectacle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which allows for viewing of multi-2D, 3D and multi-3D videos with one spectacle device, and allows for listening of sound for each content in the case of multi-view display, and to provide a spectacle device, a display method and an operation method of the spectacle device.SOLUTION: The spectacle device includes: a first retarder for delaying the phase of a first video and a second video output simultaneously from a display device; a second retarder for delaying the phase of the first video and second video in a direction different from that of the first retarder; a first shutter glass and a second shutter glass for changing the polarization properties of the first video and second video having rotated optical axes, respectively, depending on the presence and absence of application of power supply; and a control unit for applying a power supply to the first shutter glass and second shutter glass selectively, so as to view the first video and second video selectively.

Description

  The present invention relates to a pattern retarder display device, and more particularly, a display device, glasses device, and display method capable of displaying a multi-view and 3D video by combining a pattern retarder display device and a glasses device. And an operation method of the eyeglass device.

  With the development of electronic technology, various electronic devices have been developed and spread. As a typical home appliance, a display device such as a television is used.

  As display devices become more sophisticated, the types of content displayed on the display devices have increased in various ways. In particular, recently, a stereoscopic display system capable of viewing up to 3D content has been developed and spread.

  Stereoscopic display devices are realized not only with 3D TVs used in general homes but also with various display devices such as various monitors, mobile phones, PDAs, personal computers, set-top personal computers, tablet personal computers, digital photo frames, and kiosk terminals. May be. Note that 3D display technology may be used not only in homes but also in various fields that require 3D imaging, such as science, medicine, design, education, advertising, and computer games.

  Stereoscopic display systems can be broadly classified into non-glasses systems that can view stereoscopic images without glasses, and glasses systems that must be viewed while wearing glasses.

  A non-glasses system is also called an autostereoscopic system. Non-glasses 3D display devices display different spatially-shifted multi-point images and use different parallax barrier technology or lenticular lenses to differentiate the left and right eyes of the viewer The light corresponding to the video at the time is projected so that the user can feel a stereoscopic effect.

  Non-glasses-based systems can view 3D images without glasses, which has the advantage of reducing production costs, but cannot provide a perfect stereoscopic effect and limit the viewing area (viewing area). There was a disadvantage of being.

  The glasses-type system includes a separate glasses device for viewing the display device. The glasses apparatus is classified into an active glasses apparatus and a passive glasses apparatus.

  In general, when an active glasses device is used, the display device alternately outputs a left eye image and a right eye image, and the active glasses device worn by the user outputs the left eye image and the right eye image of the display device. In synchronization with the timing, the left and right shutter glasses are alternately opened and closed. The user views only the left eye image through the left eye, views only the right eye image through the right eye, and can feel a three-dimensional effect due to the depth difference between the left eye image and the right eye image.

  On the other hand, when the passive glasses device is used, there is a method in which the display device is configured to set the polarization differently by providing polarization panels having different optical axes for each region of the display image. Such a system is a pattern retarder system, and in this case, the polarizing panel includes a pattern retarder.

  At this time, the passive glasses apparatus may include a wavelength delay plate that transmits only an image of a specific pattern region of the pattern retarder. For example, the left eye lens of the passive glasses device may include a second wavelength delay plate in the direction opposite to the first pattern region, and the right eye lens may include a second wavelength delay plate in the direction opposite to the second pattern region. The first wavelength delay plate compensates the image by delaying the phase of the image wavelength delayed in the first pattern region in the opposite direction. On the other hand, the first wavelength delay plate rotates the optical axis of the polarized light in order to delay again the phase of the image wavelength whose wavelength is delayed in the second pattern region in the same direction. The left-eye lens further includes a polarizing filter having a specific optical axis in addition to the first wavelength delay plate, and the polarizing filter has an optical axis perpendicular to the polarizing filter among the images that have passed through the first wavelength delay plate. Shut off. As a result, the left eye lens transmits only the image of the first pattern region.

  Similarly, the second wavelength delay plate compensates the video by delaying the phase of the video wavelength delayed in the second pattern region in the opposite direction. On the other hand, the second wavelength delay plate rotates the optical axis of the polarized light in order to delay again the phase of the image wavelength delayed in the first pattern region in the same direction. The right-eye lens further includes a polarizing filter having a specific optical axis in addition to the second wavelength delay plate, and the polarizing filter has an image having an optical axis perpendicular to the polarizing filter among the images passing through the second wavelength delay plate. Shut off. As a result, the right eye lens transmits only the image of the second pattern region.

  Eventually, a user wearing a passive glasses device can view only the left eye image through the left eye, only the right eye image through the right eye, and feel a stereoscopic effect due to the depth difference between the left eye image and the right eye image. Can do.

  The above-described glasses-type stereoscopic video display system may be used in a multi-view environment in which a plurality of people can respectively view a plurality of contents.

  When the above-described active shutter glass method is used in a multi-view system, the display apparatus alternately outputs a video frame of the first content and a video frame of the second content. The eyeglass device worn by the user synchronizes with the output timing of the video frame of the first content and the video frame of the second content on the display device, and simultaneously turns on and off the left and right shutter glasses.

  For example, when the first user views the first content, the glasses device worn by the first user simultaneously turns on the left and right shutter glasses at the timing when the display device displays the video frame of the first content, and the display device The left and right shutter glasses are simultaneously turned off at the timing of displaying two content video frames. On the other hand, when the second user views the second content, the glasses device worn by the second user simultaneously turns off the left and right shutter glasses at the timing when the display device displays the video frame of the first content. At the timing of displaying the video frame of the second content, the left and right shutter glasses are simultaneously turned on. Since the shutter glass is turned on / off early, and afterimages that have been viewed remain on the retina while the images that have not been viewed are blocked, the user can naturally see the images that they view. Recognize that.

  Passive eyeglass devices may also be used for multi-view systems. At this time, the left eye lens and the right eye lens of the first passive glasses device may all include a first wavelength retardation plate in a direction opposite to the first pattern region. The first wavelength delay plate compensates the image by delaying the phase of the image wavelength delayed in the first pattern region in the opposite direction. On the other hand, the first wavelength delay plate rotates the optical axis of the polarized light in order to delay again the phase of the image wavelength whose wavelength is delayed in the second pattern region in the same direction. The left eye lens and the right eye lens further include a polarization filter having a specific optical axis in addition to the first wavelength delay plate, and the polarization filter is perpendicular to the polarization filter in the image that has passed through the first wavelength delay plate. Blocks images with an optical axis. As a result, the first passive glasses apparatus transmits only the image of the first pattern area.

  On the other hand, the left eye lens and the right eye lens of the second passive glasses apparatus are all provided with a second wavelength delay plate in the opposite direction to the second pattern region, and the phase of the image wavelength delayed in the second pattern region is opposite. Compensate the video with a delay in the direction. On the other hand, the second wavelength delay plate rotates the optical axis of the polarized light in order to delay again the phase of the image wavelength delayed in the first pattern region in the same direction. The left eye lens and the right eye lens of the second passive glasses device further include a polarization filter having a specific optical axis in addition to the second wavelength delay plate, and the polarization filter is a part of the image that has passed through the second wavelength delay plate. The image having the optical axis perpendicular to the polarizing filter is blocked. As a result, the second passive glasses device transmits only the image of the second pattern region.

  The passive glasses device requires a lens having a wavelength delay plate in a different direction or a polarization filter in a different direction when viewing 3D glasses and viewing a multi-view video. That is, in the case of 3D video, the polarization properties of the left eye and the right eye are different, whereas in the multi 2D video, the polarization properties of the left eye and the right eye are the same and differ according to the contents. It is impossible to view all 3D video and multi-view video on the device. As a result, there is an inconvenience that the glasses apparatus must be replaced according to the content type.

  Note that when viewing multiple views, there is a problem in that, since there is no separate audio reception and output means, a plurality of viewers viewing different contents must listen to the same sound output from the display device. It was.

  Furthermore, there is a need for a method in which a plurality of users can view a plurality of different 3D contents through a glasses device on a pattern retarder display device.

US20120081623 US20080129900

    Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to allow viewing of multi-2D, 3D, and multi-3D images with a single eyeglass device, and for a multi-view display. The present invention provides a display device, a glasses device, a display method, and an operation method of the glasses device that can listen to sound for each content.

  In order to achieve the above object, an eyeglass device according to an embodiment of the present invention includes a first retarder that rotates an optical axis in different directions for a first image and a second image output from a pattern retarder display device, respectively. A second retarder, a first shutter glass and a second shutter glass that change polarization characteristics of the first image and the second image, respectively, in which the optical axis is rotated, depending on whether or not power is applied, and the first shutter glass, And a control unit that controls to selectively apply the power to each of the first shutter glass and the second shutter glass in order to selectively view one video and the second video.

  At this time, each of the first shutter glass and the second shutter glass is switched in orientation when the power is applied, and the first image and the second image in which the optical axis is rotated according to the switched orientation. A first liquid crystal cell (Liquid Crystal Cell) and a second liquid crystal cell that transmit two images as they are; a first polarizer and a second polarizer that respectively polarize images transmitted through the first liquid crystal cell and the second liquid crystal cell; May be included.

  The eyeglass device may further include a communication unit that receives an audio signal from the pattern retarder display device, and an audio output unit that outputs the received audio signal.

  The eyeglass device further includes a communication unit that receives a synchronization signal from the pattern retarder display device, and the control unit receives the first shutter glass and the second shutter according to the received synchronization signal. You may control to selectively apply the said power supply to each of each glass.

  At this time, when the pattern retarder display device displays a plurality of 2D contents, the control unit receives an audio signal of 2D contents corresponding to the glasses device among the plurality of 2D contents, and the audio output unit It may be controlled to output the received audio signal via the.

  When the pattern retarder display device displays a plurality of 2D contents, the control unit performs control so that power is supplied to only one of the first shutter glass and the second shutter glass. It's okay.

  When the pattern retarder display device displays one 3D content, the control unit may control to supply power to both the first shutter glass and the second shutter glass or not to supply power. .

  When the pattern retarder display device displays a plurality of 3D contents, the controller applies power to the first shutter glass and the second shutter glass according to the received synchronization signal. An operation and a second operation; a third operation in which power is applied to the second shutter glass without applying power to the first shutter glass; and a power to the first shutter glass, and the second shutter You may control to perform sequentially the 4th operation | movement which does not apply a power supply to glass.

  When the pattern retarder display device displays a plurality of 3D contents, the controller applies power to the first shutter glass and the second shutter glass according to the received synchronization signal. An operation, a second operation in which power is not applied to the first shutter glass and the second shutter glass, a third operation in which power is applied to the second shutter glass without applying power to the first shutter glass, and You may control to perform a 4th operation | movement sequentially.

  In addition, when the pattern retarder display device displays a plurality of 3D contents, the control unit receives an audio signal of 3D content corresponding to the glasses device among the plurality of 3D contents, and the audio output unit It may be controlled to output the received audio signal through the network.

  The glasses apparatus further includes an input unit that receives a user input, and the control unit identifies a display mode of the pattern retarder display device according to the received user input, and enters the identified display mode. Accordingly, control may be performed so that at least one of the synchronization signal and the audio signal is received, and the power supply is selectively applied to each of the first shutter glass and the second shutter glass.

    As described above, according to the present invention, it is possible to view multi-2D, 3D, and multi-3D images with a single eyeglass device, and in the case of a multi-view display, it is possible to listen to sound for each content.

It is a mimetic diagram of a display system concerning one embodiment of the present invention. It is a block diagram which shows the structure of the display apparatus which concerns on one Embodiment of this invention. It is a schematic diagram which shows the screen of a display apparatus. It is a block diagram which shows the structure of the display apparatus which concerns on another embodiment of this invention. It is a block diagram which shows the structure of the spectacles apparatus which concerns on one Embodiment of this invention. It is a schematic diagram which shows the structure and operation | movement of a spectacles apparatus. FIG. 6 is a diagram illustrating a display operation according to an embodiment of the present invention in a single 3D mode. FIG. 6 is a diagram illustrating a display operation according to an embodiment of the present invention in a multi 2D mode. It is a block diagram which shows the structure of the signal processing part which concerns on one Embodiment of this invention. FIG. 10 is a diagram illustrating an operation of the glasses apparatus according to display operations of first to fourth video frames according to an embodiment of the present invention, respectively in a multi 3D mode. FIG. 10 is a diagram illustrating an operation of the glasses apparatus according to display operations of first to fourth video frames according to an embodiment of the present invention, respectively in a multi 3D mode. FIG. 10 is a diagram illustrating an operation of the glasses apparatus according to display operations of first to fourth video frames according to an embodiment of the present invention, respectively in a multi 3D mode. FIG. 10 is a diagram illustrating an operation of the glasses apparatus according to display operations of first to fourth video frames according to an embodiment of the present invention, respectively in a multi 3D mode. It is a figure which shows the drive voltage of a liquid crystal cell. FIG. 6 is a diagram illustrating an operation of the glasses apparatus according to display operations of first to fourth video frames according to another embodiment of the present invention, respectively in a multi 2D mode. FIG. 6 is a diagram illustrating an operation of the glasses apparatus according to display operations of first to fourth video frames according to another embodiment of the present invention, respectively in a multi 2D mode. FIG. 6 is a diagram illustrating an operation of the glasses apparatus according to display operations of first to fourth video frames according to another embodiment of the present invention, respectively in a multi 2D mode. FIG. 6 is a diagram illustrating an operation of the glasses apparatus according to display operations of first to fourth video frames according to another embodiment of the present invention, respectively in a multi 2D mode. It is a figure explaining operation | movement of the spectacles apparatus when video data changes alternately with the Odd / Even line of a pattern retarder. It is a figure explaining operation | movement of the spectacles apparatus when video data changes only to the Odd line of a pattern retarder. It is a figure which shows the method of transmitting a synchronizing signal to glasses apparatus using a Bluetooth technique. It is a figure which shows the external appearance structure of the spectacles apparatus which concerns on one Embodiment of this invention. 5 is a flowchart of a display method according to various embodiments of the present invention. 5 is a flowchart of an operation method of a glasses apparatus according to various embodiments of the present invention.

    Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Display system>
FIG. 1 is a schematic diagram of a display system according to an embodiment of the present invention.

  Referring to FIG. 1, a display system 1000 according to an embodiment of the present invention includes a display device 100 and one or more glasses devices 200-1 and 200-2.

  The display device 100 displays 2D (2-Dimensional) content or 3D (3-Dimensional) content according to the display mode.

  Here, the content may be content that has already been produced, such as VoD (Video On Demand) content, premium VoD content, broadcast content, Internet content, local files, and external content connected via a DLNA network. However, the present invention is not limited to this, and recorded broadcast content, real-time broadcast content, and the like may be possible.

  The 3D content refers to content that allows a user to feel a three-dimensional effect using multi-time images that represent the same object from different viewpoints. On the other hand, 2D content means content composed of video frames expressed at one time point. The 3D content includes depth information indicating the degree of stereoscopic effect.

  The display apparatus 100 can operate in a 2D mode in which a video frame of 2D content is displayed on the display unit, or in a 3D mode in which a video frame of 3D content is displayed on the display unit.

  The 2D mode may be any one of a single 2D mode that sequentially outputs video frames of one 2D content and a multi 2D mode that outputs video frames of a plurality of 2D contents.

  Here, the meaning of sequentially outputting means that the video frames constituting the content are sequentially displayed on the display unit at a predetermined time interval. For example, in the case of video frames A, B, C, D,..., Z of 2D content, A, B, C, D,.

  As shown in FIG. 1, the display device 100 may be switched between a multi 2D mode (DV), a 3D mode (3D), and a 3D multi mode (DV / 3D). Although not shown in the figure, a single 2D mode is also possible. At this time, as described later, at least one of the synchronization signal and the audio signal is transmitted to the glasses apparatus according to the display mode.

  In this specification, the display device 100 includes one or more displays, and is configured as a device configured to execute an application or display content, for example, a digital television (Digital television), a tablet (Tablet). ) Personal computer (Personal Computer: PC), portable multimedia player (Portable Multimedia Player: PMP), personal information terminal (Personal Digital Assistant: PDA), smart phone (Smart Phone), mobile phone, digital photo frame, digital At least one of signage (digital signature) and kiosk terminal May appear. In the following, a digital television will be described as an embodiment.

  <Configuration and operation of display device>

  First, the configuration and operation of the display device 100 will be described.

  FIG. 2 is a block diagram illustrating a configuration of the display apparatus 100 according to an embodiment of the present invention.

  Referring to FIG. 2, the display apparatus 100 according to an embodiment of the present invention includes a signal processing unit 110, a display unit 120, a pattern retarder unit 130, a communication unit 140 and a control unit 150.

  The signal processing unit 110 includes a role of forming a video frame of 2D (2-Dimensional) content or 3D (3-Dimensional) content, and performs various signal processing on the received content. Specifically, audio data and video data are extracted from video content, signals for the audio data and video data are processed, and a video frame and a corresponding audio signal are configured.

  The display unit 120 outputs the video frame configured by the signal processing unit 110. Although not shown, the video frame output from the signal processing unit 110 is multiplexed via a multiplexer unit (not shown), and the display unit 120 displays the video frame of each content according to the set display mode. Are arranged differently and output.

  In the multi 2D mode, the display unit 120 may display different contents for each screen area. For example, the odd-numbered horizontal line of the screen can output the video of content 1, and the even-numbered horizontal line of the screen can output the video of content 2. On the other hand, the video of content 2 can be displayed on the odd-numbered vertical lines of the screen, and the video of content 1 can be displayed on the even-numbered vertical lines of the screen. As will be described later, the pattern retarder 130 deforms the polarization property of each region of the screen to be different so that different glasses can be viewed with different glasses devices.

  In the 3D mode, the display device 120 may display a left eye image and a right eye image for each screen area. For example, the odd-numbered horizontal line of the screen can output the left-eye image of the content, and the even-numbered horizontal line of the screen can output the right-eye image of the content. On the other hand, the right-eye video of the content can be displayed on the odd-numbered vertical lines of the screen, and the left-eye video of the content can be displayed on the even-numbered vertical lines of the screen. As will be described later, the pattern retarder 130 deforms the polarization properties of the screen areas so that the left eye image and the right eye image are different from each other in the left eye lens and the right eye lens of the eyeglass device. To be able to penetrate.

  The pattern retarder 130 polarizes the output video frame differently for each region. Although not shown in the figure, the display apparatus 100 linearly polarizes an image displayed with a polarizing member in a specific direction. Since the linearly polarized light passes through the pattern retarder 130 and is birefringent, a phase difference is generated, so that the light is transformed into circularly polarized light. In the embodiment of the present specification, it is assumed that the display apparatus 100 first outputs an image with the image polarized in the horizontal direction. However, the present invention is not limited thereto, and the embodiment is an embodiment in which the image is polarized in another direction. including.

  The pattern retarder unit 130 is attached to a display panel (not shown) of the display apparatus 100. In an exemplary embodiment, the pattern retarder unit 130 may include a first pattern that faces an odd-numbered line in a pixel array of a display panel (not shown), and an even-numbered line in a pixel array of a display panel (not shown). And an opposing second pattern. As described above, in this case, the optical axis of the first pattern is different from the optical axis of the second pattern. For example, each of the first pattern and the second pattern can delay the phase of incident light by −1/4 wavelength and ¼ wavelength. In this case, the linearly polarized light is transformed into circularly polarized light having different directions. For example, the pattern retarder unit 130 converts the image light displayed on the odd-numbered lines of the pixel array into the left circularly polarized light, and the second pattern of the pattern retarder unit 130 is the even-numbered display line of the pixel array. The light of the image displayed on the screen can be converted into right circularly polarized light.

  At this time, one eyeglass device includes a retarder film that delays the phase of incident light by ¼ wavelength or −1/4 wavelength, a liquid crystal cell that delays by ½ wavelength or −½ wavelength, and a polarizing plate. The eyeglass device transmits only the image of the odd-numbered line or the image of the even-numbered line through the above configuration. Detailed contents will be described later.

  FIG. 3 is a schematic diagram showing a screen of the display device 100.

  As described in FIG. 3A and the above-described embodiment, the pattern retarder unit 130 can have different phase delays for each horizontal pixel line, but each pattern region of the pattern retarder unit 130 is not necessarily limited. Does not have to be separated by horizontal lines. That is, as shown in FIG. 3B, the pattern retarder unit 130 may include a third pattern 133 that faces the odd-numbered lines and a fourth pattern 134 that faces the even-numbered lines for each vertical line. .

  The communication unit 140 communicates with the eyeglass device 200 that can view the polarized video frame. First, the communication unit 140 receives a user command. The user command means various commands for controlling the display device 100 and includes a display mode switching command for the display device 100. The user command may be generated and transmitted from a remote control device (hereinafter referred to as a remote controller) or the glasses device 200. Secondly, the communication unit 140 performs pairing with the glasses apparatus 200, transmits a transmission stream including a synchronization signal to the glasses apparatus 200, and synchronizes with the glasses apparatus 200. Third, the communication unit 140 transmits an audio signal to the glasses apparatus 200.

  Hereinafter, a user command for switching the display mode will be briefly described.

  In the present invention, the display mode includes a 2D single view mode for displaying one 2D content, a 2D multiview mode for displaying a plurality of 2D contents, a 3D single view mode for displaying one 3D content, and a plurality of 3D contents. This means any one of 3D multi-view modes.

  The user can set the display mode via a mode switching button of a remote controller (not shown) or an input unit of the glasses device 200 (see FIG. 22). The latter will be described in the description of the eyeglass device 200, and here, the mode switching input through the remote controller will be described.

  When the user presses a mode switching button (not shown) on a remote controller (not shown), a display mode switching command is generated and transmitted to the display apparatus 100 via communication means (not shown). The control unit 150 of the display apparatus 100 identifies the display mode according to the received mode switching command. When the current display mode is different from the display mode corresponding to the received mode switching command, the control unit 150 switches the display mode according to the received display mode. That is, control is performed so that the video frame is configured according to the display mode in which the signal processing unit 110 is switched. When the switched display mode is the multi 2D mode or the multi 3D mode, at least one of the synchronization signal and the audio signal is generated and transmitted to the glasses apparatus 200 via the communication unit 140.

  As an embodiment, the communication unit 140 can be realized by a Bluetooth communication module. Accordingly, the communication unit 140 can generate a transmission stream according to the Bluetooth communication standard so that at least one of the synchronization signal and the audio signal is included, and transmit the transmission stream to the glasses apparatus 200. When the display mode is the multi 2D mode or the multi 3D mode, the communication unit 140 can transmit an audio signal for each content to the corresponding glasses device 200 under the control of the control unit 150. In the case of the multi 3D mode, the operation of the glasses apparatus 200 changes due to the frame rate conversion, and thus a synchronization signal is transmitted. In the embodiments of FIGS. 15 to 18 to be described later, since the operation of the glasses apparatus 200 changes even in the multi 2D mode, the synchronization signal should be transmitted to the glasses apparatus 200.

  The control unit 150 controls the overall operation of the display apparatus 100. Specifically, the control unit 150 controls each of the signal processing unit 110, the multiplexer unit (not shown), the display unit 120, and the communication unit 140 so as to perform corresponding operations. be able to. In particular, at least one of the synchronization signal and the audio signal is transmitted to the glasses apparatus according to the display mode. Specifically, when the display mode is the multi 2D mode or the multi 3D mode, the control unit 150 can transmit at least one of the synchronization signal and the audio signal for each content to the corresponding glasses apparatus 200. On the other hand, in the single 3D mode, since the frame rate does not change and the left eye shutter glass and the right eye shutter glass of the glasses apparatus 200 are fixed, viewing is performed. No transmission is necessary.

  The control unit 150 may be a microprocessor, an IC chip, a CPU (Central Processing Unit), or an MPU (Micro Processor Unit) from the viewpoint of hardware, and includes an OS and an application from the viewpoint of software. A control command for operating the display apparatus 100 is read by the memory according to the system clock, and an electrical signal is generated according to the read control command to operate each component of the hardware.

  FIG. 4 is a block diagram illustrating a configuration of a display apparatus 100 ′ according to another embodiment of the present invention.

  Referring to FIG. 4, a display apparatus 100 ′ according to another embodiment of the present invention further includes a receiving unit 160, a synchronization signal generating unit 170, and an audio output unit 180 in addition to the above configuration.

  A plurality of receiving units 160 may be provided. In particular, in the multi-view mode (multi-2D mode, multi-3D mode) or 3D mode, different content or left-eye video and right-eye video may be received from different sources. Receive data from different sources.

  The receiving unit 160 can receive content from a web server that transmits content files using a broadcasting station that transmits broadcast program content using the broadcast network or the Internet. Note that content can also be received from various recording medium playback devices provided in the display device 100 ′ or connected to the display device 100 ′. Here, the recording medium device means a device that reproduces content stored in various recording media such as a CD, a DVD, a hard disk, a Blu-ray disc, a memory card, and a USB memory.

  In the embodiment of receiving content from a broadcasting station, the receiving unit 160 includes a configuration such as a tuner (not shown), a demodulator (not shown), an equalizer (not shown), and the like. It may be realized in the form. On the other hand, in the embodiment of receiving content from a source such as a web server, the receiving unit 160 can be realized by a network interface card (not shown). Alternatively, in the embodiment in which content is received from the various recording medium playback devices described above, the receiving unit 160 may be realized by an interface unit (not shown) connected to the recording medium playback device. For example, it can be realized with an AV terminal, a COMP terminal, an HDMI (registered trademark) terminal, or the like. In addition, the receiving unit 160 may be realized in various forms according to the embodiment. When a plurality of receiving units 160 are provided, each receiving unit can receive content from different types of sources to form a hybrid system.

  The synchronization signal generation unit 170 generates a synchronization signal for synchronizing the eyeglass device 200 corresponding to each content according to the display timing of each content. Since it is not necessary to synchronize the glasses apparatus 200 in the single 2D mode and the single 3D mode, no separate synchronization signal is required.

  On the other hand, in the multi 3D mode, since the frame rate is changed, the display apparatus 100 ′ must generate a synchronization signal and transmit it to each glasses apparatus 200. The operations of the display device 100 ′ and the glasses device 200 will be described later in detail. Also in the case of the multi 2D mode, in the case of the embodiments of FIGS. 18 to 21, since the frame rate needs to be changed in order to include the black video, the synchronization signal should be generated.

  Hereinafter, a hardware configuration of the display apparatus 120 will be described.

  The display unit 120 is configured to output a signal-processed video frame. The display unit 120 includes a timing controller (not shown), a gate driver (not shown), a data driver (not shown), a voltage driver (not shown), a display panel (not shown), a polarizing plate (see FIG. (Not shown).

  A timing controller (not shown) receives a clock signal (DCLK), a horizontal synchronization signal (Hsync), a vertical synchronization signal (Vsync), etc. suitable for the resolution of the display apparatus 100 from the outside, and a gate control signal (scanning control signal). ), A data control signal (data signal) is generated, and the input R, G, B data is rearranged and supplied to the data driver.

  A timing controller (not shown) is related to the gate control signal, and includes a gate shift clock (GSC), a gate output enable (GOE), and a gate start pulse (Gate Start Pulse: GSP). Here, GSC is a signal that determines a time when a TFT connected to a light emitting element such as R, G, B OLED is turned on / off (On / Off). , GOE is a signal for controlling the output of the gate driver, and GSP is a signal for notifying the first drive line of the screen among one vertical synchronizing signal. The timing controller (not shown) relates to the data control signal, and includes a source sampling clock (SSC), a source output enable (SOE), a source start pulse (Source Start Pulse: SSP). Etc. can be generated.

  A gate driver (not shown) is connected to the display panel through the scanning lines S1, S2, S3,. A gate driver (not shown) applies a gate on / off voltage (Vgh / Vgl) provided from the voltage driver to the display panel according to a gate control signal generated by the timing controller. The gate-on voltage Vgh is sequentially provided from the gate line 1 (GL1) to the gate line N (GLn) in order to realize a unit frame image on a display panel (not shown). A data driver (not shown) is connected to a display panel (not shown) through data lines D1, D2, D3,. In the data dry (not shown), the scaling is completed according to the data control signal generated by the timing controller (not shown), and the RGB data of the 3D left-eye video image frame and the right-eye video image frame of the 3D video data. Is input to a display panel (not shown). A data driver (not shown) converts RGB video data provided in serial by a timing controller (not shown) into parallel, converts digital data into analog voltage, and outputs a single horizontal signal. Video data corresponding to the line is provided to a display panel (not shown). This process is performed sequentially for each horizontal line.

  A voltage driver (not shown) generates and transmits drive voltages to a display panel (not shown), a gate driver (not shown), a data driver (not shown), and the like. That is, a normal power supply from the outside, that is, an AC voltage of 110V or 220V is provided to generate and provide a power supply voltage (VDD) necessary for a display panel (not shown), or a ground voltage (VSS) is provided. can do. A gate-on voltage (Vgh) can be generated and provided to a gate driver (not shown). For this purpose, the voltage driving unit (not shown) may include a plurality of voltage driving modules (not shown) that operate individually. Here, a plurality of voltage driving modules (not shown) can operate to provide different voltages according to the control of the control unit 150, and the control unit 150 can operate according to preset information. Thus, the voltage driver (not shown) can be controlled so that the plurality of voltage driving modules provide different driving voltages.

  In the display panel (not shown), a plurality of gate lines GL1 to GLn and data lines DL1 to DLn for defining a pixel region intersecting each other are formed, and in the intersecting pixel region (not shown) R, G, and B light emitting elements such as OLEDs may be formed. A switching element, that is, a THT is formed in a region of the pixel region (not shown), more precisely, in a corner. In such a THT turn-on operation, the gradation voltage is provided from the data driver 133 to the R, G, and B light emitting elements. At this time, the R, G, and B light emitting elements provide light according to the amount of current provided based on the grayscale voltage. That is, when a large amount of current is provided, the light emitting elements of R, G, and B provide more light.

  The display panel (not shown) may be realized by an AM-OLED (Active Matrix Organic Light Emitting Diode) panel. However, the above-described embodiment is merely an embodiment of the present invention, and it is needless to say that the present invention does not exclude PM OLED (Passive Matrix Organic Light Emitting Diode), which is a system in which one line simultaneously emits light and is driven. It is.

  A polarizing plate (not shown) is provided in the screen representation of the display apparatus 100, and polarizes an image output from the display apparatus 100 in a preset direction. An image passing through a polarizing plate (not shown) is mainly linearly polarized. However, it is necessary when the display device provides a multi-view that displays a plurality of contents or displays 3D contents including a left-eye image and a right-eye image according to various embodiments of the present invention described above. Accordingly, it is possible to output an image polarized in a plurality of directions. That is, polarizers having different optical axes can be provided, and polarizers having different optical axes can be provided according to the pattern region of the pattern retarder unit 130.

  The display unit 120 includes a liquid crystal display panel (Liquid Crystal Display Panel), a plasma display panel (Plasma Display Panel), an OLED (Organic Light Emitting Diode), a VFD (Vacuum Fluorescent DiseD), and a VFD (Vacuum Fluorescent DiseD). It may be realized by various display technologies such as Electro Luminescence Display).

  The audio output unit 180 is configured to output the content sound to the outside. The audio output unit 180 may include an audio decoder (not shown), a modulation unit (not shown), and at least one speaker (not shown). The display apparatus 100 separates video data and audio data from the content received by the receiving unit 110 via a demultiplexer (not shown). An audio decoder (not shown) decodes the separated audio data, and a modulation unit (not shown) modulates the decoded audio data into different frequency signals. A speaker (not shown) outputs each modulated audio data. One or a plurality of speakers (not shown) may be formed at a suitable position or a position of the housing of the display apparatus 100 ′. In the case of the multi-view mode (multi 2D mode, multi 3D mode), the sound may be different depending on the content. Therefore, when the display apparatus 100 ′ is shifted to such a mode, the audio output unit 180 does not make a sound. An audio signal of each content is transmitted to the glasses apparatus 200 via the communication unit 140.

<Configuration and operation of eyeglass device>
Hereinafter, the configuration and operation of the glasses apparatus 200 will be described.

  FIG. 5 is a block diagram showing the configuration of the eyeglass device 200 according to one embodiment of the present invention.

  Referring to FIG. 5, a glasses apparatus 200 according to an embodiment of the present invention includes a first retarder 251, a second retarder 261, a first shutter glass 250, a second shutter glass 260, a power supply unit 230, and A control unit 220 is included. And although not shown in figure, you may further include a communication part (not shown).

  A communication unit (not shown) communicates with the display apparatus 100 that polarizes and outputs a video frame differently for each region via the pattern retarder unit 130. Specifically, it communicates with the display device 100 and receives at least one of the synchronization signal and the audio signal.

  For example, when the display mode is the multi 3D mode and the communication unit (not shown) is realized by a Bluetooth communication module, the transmission stream that communicates with the display device 100 according to the Bluetooth communication standard and includes a synchronization signal. Can be received. In this case, the transmission stream includes time information for turning on or off the first shutter glass 250 and the second shutter glass 260 of the glasses apparatus 200 in synchronization with the display timing of the image frame of each content. The shutter glass can be turned on or off according to the display timing of the content image frame.

  Meanwhile, a communication unit (not shown) is realized by an IR receiving module, and can receive an infrared-type synchronization signal having a specific frequency. In this case, time information for turning on or off the first shutter glass unit 250 and the second shutter glass unit 260 of the glasses apparatus 200 is included so as to be synchronized with the display timing of the video frame of the content.

  Meanwhile, the communication unit (not shown) can also receive information on the video frame rate and the video frame period for each content from the display apparatus 100.

  The control unit 220 controls the overall operation of the glasses apparatus 200. The controller 220 transmits a synchronization signal received from a communication unit (not shown) to the power supply unit 230 and controls the operation of the power supply unit 230. That is, the control unit 220 performs control such that a drive signal for driving the first shutter glass unit 250 and the second shutter glass unit 260 is generated based on the synchronization signal.

  The first retarder 251 is configured to birefring the image polarized by the display device 100. The first retarder 251 includes a fast axis and a slow axis, and the birefringent image corresponds to the fast axis and the slow axis, respectively, and is transformed into a polarization component having a constant phase difference. The For example, the first retarder 251 can birefring the image polarized and output to the display device 100 to transform linearly polarized light into circularly polarized light or elliptically polarized light, and conversely change the direction of the circularly polarized light. Circularly polarized light can be transformed into linearly polarized light. The first retarder 251 may be a quarter-wave plate retarder film or a half-wave plate retarder film.

  In the case of a quarter wave retarder film, linearly polarized light is transformed into circularly polarized light. Two quarter-wave retarder films are provided continuously, or in the case of a half-wave retarder film, the optical axis of linearly polarized light is rotated by 90 degrees. On the other hand, when the wavelength retardation direction of the quarter-wave retarder film is different, light that has been linearly polarized and transformed into circularly polarized light returns to linearly polarized light again. If such a property of the first retarder 251 is used, only selectively polarized video can be transmitted, and multi-view and 3D video viewing are possible.

  The second retarder 261 performs the same function as the first retarder. The first retarder 251 and the second retarder 261 of the present invention rotate the optical axes of the first video and the second video output from the display apparatus 100 in different directions. In an embodiment of the present invention, the second retarder 261 delays the phase in the opposite direction to the first retarder 251. That is, if the first retarder 251 is a -1/4 wavelength retarder film, a ¼ wavelength retarder film may be used as the second retarder 261. Of course, the opposite is also possible.

  The first shutter glass 250 and the second shutter glass 260 change the polarization characteristics of the first image and the second image in which the optical axis is rotated, respectively, depending on whether power is applied. In this case, the control unit 220 performs control so that the power is selectively applied to each of the first shutter glass and the second shutter glass in order to selectively view the first video and the second video.

  FIG. 6 is a schematic diagram illustrating the configuration and operation of the eyeglass device.

  As described above, the eyeglass device 200 includes the first retarder 251, the second retarder 261, the first shutter glass 250, the second shutter glass 260, the power supply unit 230, and the control unit 220.

  As shown in FIG. 6, the first shutter glass 250 includes a liquid crystal cell 252 and a rear polarizer 253, and the second shutter glass 260 includes a liquid crystal cell 262 and a rear polarizer 263.

  The liquid crystal cell 252 has a configuration in which the orientation is switched according to the driving voltage, and the polarization characteristics are changed according to the switched orientation. The property of polarization may be the phase or direction of polarization. That is, when a polarized image is incident, when a specific driving voltage is applied to the liquid crystal cell and alignment is performed, the function of delaying the wavelength of the incident light or allowing the incident light to pass through can be performed. . For example, the liquid crystal cell may be an active retarder, and when a specific voltage is applied or not applied, the polarization direction of a linearly polarized image is changed (phase change), and the phase of circular polarization is changed. And the direction of circular polarization can be reversed. In one embodiment, when no voltage is applied, the optical axis of linearly polarized light can be rotated 90 degrees (the phase difference is changed by λ / 2), and when a voltage is applied, what is applied to the incident light It can be passed through without change. That is, when no voltage is applied, if the incident light is linearly polarized, the polarization direction is rotated 90 degrees, and if it is left circularly polarized, the polarization direction is rotated 90 degrees and left circularly polarized. The right circularly polarized light is transformed into the left circularly polarized light.

  The implementation of the liquid crystal cell 252 is not limited to a specific technology, but in one embodiment, may be a TN ECB (electrically controllable birefringence) Cell or a TN OCB (Optically Compensated Bend) Cell.

  The rear polarizer 253 is configured to again polarize the image that has passed through the liquid crystal cell 252, and blocks a component orthogonal to the polarization axis. The rear polarizer 253 transmits only the polarization component orthogonal to or parallel to the output polarization of the display device 100 according to the purpose.

  The liquid crystal cell 262 operates in the same manner as the liquid crystal cell 252. In the embodiment as described above, it is assumed that the liquid crystal cell 252 and the liquid crystal cell 262 rotate the optical axis by 90 degrees when no voltage is applied, and transmit the image as it is when the voltage is applied. However, depending on the realization, it is also possible to operate in the opposite direction.

  The rear polarizer 263 also operates in the same manner as the rear polarizer 253. However, depending on the embodiment, the polarization axis can be set differently. In this case, the retarder and the liquid crystal cell should be appropriately adjusted to suit the purpose. For example, one of the rear polarizers may have a horizontal polarization axis and the other rear polarizer may have a vertical polarization axis. In this case, unlike the above-described embodiment, the power applied to one liquid crystal cell of the two rear polarizers should be reversed.

  In summary, as shown in FIG. 6, the display apparatus 100 birefringes the polarized image via the pattern retarder unit 130 and outputs the polarized image, and the output image is output from the first retarder 251 of the glasses apparatus 200 and the first retarder 251. The control unit 220 generates a control signal to operate the power supply unit 230, and the power supply unit 230 selectively applies voltages to the liquid crystal cells 252 and 262, respectively. By selectively changing the orientation of the cells 252 and 262, the polarization property of the image that has passed through the retarders 251 and 261 is changed. Eventually, the images passing through the liquid crystal cells 252 and 262 pass through the rear polarizers 253 and 263, respectively, and only the polarized images in a certain direction enter the human eye.

  Meanwhile, the above-described glasses device 200 may further include an audio output unit (not shown) that outputs the received audio signal.

  Conventionally, in the case of a multi-view system, since there is no separate audio reception and output means, there is a problem that a plurality of viewers viewing different contents must listen to the same sound output from the display device. there were. However, according to the present invention, in the case of multi-view, the sound of each content is transmitted to the glasses apparatus 200, and the sound of each content can be heard by the glasses apparatus 200 via an audio output unit (not shown). Become. Therefore, the audio output unit (not shown) of the glasses apparatus 200 may include an earphone (not shown).

  Hereinafter, operations of the display apparatus 100 and the glasses apparatus 200 will be described for each display mode.

<Operation in single 3D mode>
FIG. 7 is a diagram illustrating a display operation according to an embodiment of the present invention in a single 3D mode.

  Referring to FIG. 7, the left-eye image (a) that is left-circularly polarized is output through the first region 131 of the pattern retarder 130 of the display apparatus 100 and the right-circularly polarized right image is output through the second region 132. An eye image (b) is output. It is assumed that the left-eye image (a) and the right-eye image (b) are first linearly polarized light having the same horizontal optical axis. It is assumed that the liquid crystal cell rotates the optical axis by 90 degrees when the voltage is OFF (phase delay by ½ wavelength) and passes the image as it is when the voltage is ON. Of course, depending on the embodiment, the operation can be reversed. It is assumed that the rear polarizers 253-1 and 263-1 block light having a polarization component in the vertical direction. Obviously, depending on the embodiment, the opposite may occur.

  At this time, the left eye shutter glass retarder 251-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in the opposite direction to the first region 131 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. The left eye image (a) that has passed through the retarder 251-1 of the left eye shutter glass returns to the linearly polarized light in the horizontal direction again. On the other hand, the retarder 251-1 for the left-eye shutter glass passes through the retarder 251-1 for the left-eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the second region 132 of the pattern retarder unit 130. The right-eye image (b) is further delayed by a quarter wavelength and the optical axis is rotated by 90 degrees, so that the right-eye image (b) changes to linearly polarized light in the vertical direction.

  Since the liquid crystal cell 252-1 of the left eye shutter glass of the glasses device 200-1 of the viewer 1 is in the ON state, the horizontally polarized left eye image (a) and the vertically polarized right eye image (b) are used as they are. Make it transparent. Since the rear polarizer 253-1 blocks light having a vertical polarization component, only the left eye image (a) finally reaches the left eye.

  On the other hand, the right eye shutter glass retarder 261-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in the opposite direction to the second region 132 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. Accordingly, the right eye image (b) that has passed through the retarder 261-1 of the right eye shutter glass returns to the linear polarization in the horizontal direction again. On the other hand, the retarder 261-1 for the right eye shutter glass passes through the retarder 261-1 for the right eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the first region 131 of the pattern retarder unit 130. The left-eye image (a) is further delayed by a quarter wavelength and the optical axis is rotated by 90 degrees, so that the left-eye image (a) changes to linearly polarized light in the vertical direction.

  Since the liquid crystal cell 262-1 of the right eye shutter glass of the glasses device 200-1 of the viewer 1 is in the ON state, the horizontally polarized right eye image (b) and the vertically polarized left eye image (a) are used as they are. Make it transparent. Since the rear polarizer 263-1 blocks light having a vertical polarization component, only the right eye image (b) finally reaches the right eye.

  Therefore, the viewer 1 wearing the glasses device 200-1 can view only the left eye image (a) through the left eye and can view only the right eye image (b) through the right eye.

  The glasses device 200-2 of the viewer 2 operates in the same manner as the glasses device 200-1 of the viewer 1. The viewer 2 wearing the glasses apparatus 200-2 can view only the left eye image (a) through the left eye and can view only the right eye image (b) through the right eye.

  On the other hand, 3D video viewing can be performed in a similar manner through the passive glasses device.

  Although not shown in the drawing, the left-eye image that is left-circularly polarized is output through the first region 131 of the pattern retarder 130 of the display device 100 and is right-circularly polarized through the second region 132, as in the case of FIG. When the right eye image is output, it can be assumed that the left eye image and the right eye image are first linearly polarized with the same horizontal optical axis. A passive glasses device (not shown) does not include a liquid crystal cell.

  The operation of the passive eyeglass device of the viewer 1 will be described. The retarder of the left eye lens has a phase delay property in the opposite direction to the first region 131 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. The left-eye image that has passed through the left-eye lens retarder returns to linear polarization again. On the other hand, the retarder of the left eye lens generates a ¼ wavelength phase difference in the same direction as the second region 132 of the pattern retarder unit 130, so that the right eye image that has passed through the retarder of the left eye lens is further 1 Since the optical axis is rotated 90 degrees after being delayed by / 4 wavelength, it changes to linearly polarized light in the vertical direction.

  Since the rear polarizer of the passive glasses device of the viewer 1 blocks light having a vertical polarization component, only the left eye image finally reaches the left eye.

  Meanwhile, the retarder of the right eye lens of the passive eyeglass device of the viewer 1 has a phase delay property in the opposite direction to the second region 132 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. Therefore, the right eye image that has passed through the retarder of the right eye lens returns to linear polarization again. On the other hand, the retarder of the right eye lens generates a ¼ wavelength phase difference in the same direction as the first region 131 of the pattern retarder unit 130, so that the left eye image that has passed through the retarder of the right eye lens is further 1 Since the optical axis is rotated 90 degrees after being delayed by / 4 wavelength, it changes to linearly polarized light in the vertical direction.

  Since the rear polarizer blocks light having a vertical polarization component, only the right eye image finally reaches the right eye.

  Therefore, the viewer 1 wearing the passive glasses device can view only the left eye image through the left eye and can view only the right eye image through the right eye.

  The passive glasses device (not shown) of the viewer 2 operates in the same manner as the passive glasses device of the viewer 1. The viewer 2 wearing the passive glasses device can view only the left eye image through the left eye and can view only the right eye image through the right eye.

  <Operation in multi 2D mode>

  Hereinafter, the display operation in the multi 2D mode will be described.

  FIG. 8 is a diagram illustrating a display operation according to an exemplary embodiment of the present invention in the multi 2D mode.

  Referring to FIG. 8, the left circularly polarized channel 1 image (a) is output through the first region 131 of the pattern retarder unit 130 of the display apparatus 100, and the right circularly polarized channel is output through the second region 132. Two images (b) are output. It is assumed that the channel 1 image (a) and the channel 2 image (b) are initially linearly polarized with the same horizontal optical axis. It is assumed that the liquid crystal cell rotates the optical axis (phase delay) when the voltage is OFF and passes the image as it is when the voltage is ON. Of course, depending on the embodiment, the operation can be reversed. It is assumed that the rear polarizers 253-1 and 263-1 block light having a polarization component in the vertical direction. Obviously, depending on the embodiment, the opposite may occur.

  At this time, the left eye shutter glass retarder 251-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in the opposite direction to the first region 131 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. The channel 1 image (a) that has passed through the left eye shutter glass retarder 251-1 returns to the linear polarization in the horizontal direction again. On the other hand, the retarder 251-1 for the left-eye shutter glass passes through the retarder 251-1 for the left-eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the second region 132 of the pattern retarder unit 130. The channel 2 image (b) is further delayed by 1/4 wavelength and the optical axis is rotated by 90 degrees, so that it is changed to linearly polarized light in the vertical direction.

  Since the liquid crystal cell 252-1 of the left eye shutter glass of the eyeglass device 200-1 of the viewer 1 is in the ON state, the channel 1 image (a) that is horizontally polarized and the channel 2 image (b) that is vertically polarized are used as they are. Make it transparent. Since the rear polarizer 253-1 blocks light having a polarization component in the vertical direction, only the channel 1 image (a) finally reaches the left eye.

  Similarly, the right eye shutter glass retarder 261-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in the opposite direction to the second region 132 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. Therefore, the channel 2 image (b) that has passed through the retarder 261-1 of the right eye shutter glass returns to the linear polarization in the horizontal direction again. On the other hand, the retarder 261-1 for the right eye shutter glass passes through the retarder 261-1 for the right eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the first region 131 of the pattern retarder unit 130. Since the channel 1 image (a) is further delayed by 1/4 wavelength and the optical axis is rotated by 90 degrees, it is changed to linearly polarized light in the vertical direction.

  However, the liquid crystal cell 262-1 of the right eye shutter glass of the eyeglass device 200-1 of the viewer 1 is in the OFF state, and in this case, operates in the same manner as the half-wave retarder. That is, the optical axis is rotated by 90 degrees, the horizontally polarized light is transformed into vertically polarized light, and the horizontally polarized light is transformed into horizontally polarized light. Therefore, a is transformed into linearly polarized light in the horizontal direction, and b is transformed into linearly polarized light in the vertical direction. Since the rear polarizer 263-1 blocks light having a polarization component in the vertical direction, only the channel 1 image (a) finally reaches the right eye as in the left eye.

  Therefore, the viewer 1 wearing the glasses device 200-1 views only the channel 1 video through the left and right eyes.

  The glasses device 200-2 of the viewer 2 also operates in a manner similar to the glasses device 200-1 of the viewer 1. However, the liquid crystal cell 252-2 of the left eye shutter glass of the glasses device 200-2 of the viewer 2 is turned off, while the liquid crystal cell 262-2 of the right eye shutter glass is turned on. Therefore, the viewer 2 wearing the glasses device 200-2 views only the channel 2 video through the left and right eyes.

  On the other hand, multi 2D video viewing is possible in a similar manner through the passive glasses device. It may be another embodiment of the present invention for viewing a display image of the display device 100 of the present invention.

  Although not shown in the drawing, a channel 1 image that is left-circularly polarized is output through the first region 131 of the pattern retarder unit 130 of the display apparatus 100 and is right-circularly polarized through the second region 132, as in the case of FIG. It is assumed that the channel 2 image is output. It is assumed that the channel 1 image and the channel 2 image are initially linearly polarized with the same horizontal optical axis.

  At this time, the retarder (not shown) of the left eye lens of the passive glasses device (not shown) of the viewer 1 has a phase delay property in the direction opposite to the first region 131 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. The channel 1 image that has passed through the left-eye lens retarder returns to linear polarization again. On the other hand, since the retarder of the left eye lens generates a quarter wavelength phase difference in the same direction as the second region 132 of the pattern retarder unit 130, the channel 2 image that has passed through the retarder of the left eye lens further includes 1 Since the optical axis is rotated 90 degrees after being delayed by / 4 wavelength, it changes to linearly polarized light in the vertical direction.

  Since the rear polarizer (not shown) of the left eye lens of the passive eyeglass device of the viewer 1 blocks light having a polarization component in the vertical direction, only the channel 1 image finally reaches the left eye. Become.

  Similarly, the retarder of the right eye lens of the eyeglass device of the viewer 1 has a phase delay property in the opposite direction to the second region 132 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. Therefore, the channel 2 image that has passed through the retarder of the right eye lens returns to linear polarization again. On the other hand, the retarder of the right eye lens generates a ¼ wavelength phase difference in the same direction as the first region 131 of the pattern retarder unit 130, so that the channel 1 image that has passed through the retarder of the right eye lens is further 1 Since the optical axis is rotated 90 degrees after being delayed by / 4 wavelength, it changes to linearly polarized light in the vertical direction.

  However, the rear polarizer of the right-eye lens of the eyeglass device of the viewer 1 blocks light having a polarization component in the vertical direction so that only the channel 1 image finally reaches the right eye, like the left eye. become.

  Therefore, the viewer 1 wearing the passive glasses device views only the channel 1 video through the left and right eyes.

  The passive glasses apparatus of the viewer 2 operates in a manner similar to the passive glasses apparatus of the viewer 1. However, the rear polarizer of the left eye lens of the passive glasses apparatus of the viewer 2 blocks light having a vertical polarization component, while the rear polarizer of the right eye lens blocks light having a horizontal polarization component. As a result, the viewer 2 wearing the passive glasses apparatus views only the channel 2 video through the left and right eyes.

  As described above, the passive glasses device may require a lens having polarizing plates in different directions when viewing 3D video and when viewing multi-view video. That is, the passive glasses device requires a lens having a wavelength delay plate in a different direction or a polarization filter in a different direction when viewing 3D video and when viewing multi-view video. In the case of 3D video, the polarization properties of the left eye and the right eye are different, whereas in the multi 2D video, the polarization properties of the left eye and the right eye are the same and are different for each content. This is because the (Fixed) passive glasses apparatus cannot view all 3D video and multi-view video. As a result, there is an inconvenience that the glasses apparatus must be replaced depending on the type of content.

  On the other hand, the above-described glasses apparatus 200 has an advantage that all the multi-2D content and 3D content can be viewed by changing the method of applying a voltage to the liquid crystal cell as necessary.

  In the case of a passive glasses device, there is a problem that there is no means for transmitting different sounds for each content.

  In order to solve the above-described problem, the glasses apparatus 200 according to another embodiment of the present invention further includes an audio output unit (not shown). At this time, when the display mode is a 2D multi-view mode in which a plurality of 2D contents are output, the control unit 220 receives an audio signal of 2D contents corresponding to the glasses device 200 among the plurality of 2D contents, and outputs the audio. It controls so that it may be output via a part (not shown). Similarly, when the display mode is a 3D multi-view mode in which a plurality of 3D contents are output, the control unit 220 receives an audio signal of 3D contents corresponding to the glasses device 200 among the plurality of 3D contents, and outputs the audio. It controls so that it may be output via a part (not shown).

  The audio signal may be transmitted by a transmission mechanism of a synchronization signal described later. This will be described later.

<Operation in multi 3D mode>
Hereinafter, the display operation in the multi 3D mode will be described.

  In order to realize the multi 3D mode, at least four different video frames are required. That is, the left eye video frame, right eye video frame of channel 1, and left eye video frame and right eye video frame of channel 2 are required. When the pattern retarder method is used, when the screen is divided into two regions having different polarization properties, it is necessary to adjust the frame rate because four images cannot be displayed. Note that the above-described glasses apparatus 200 uses a change in polarization property, but does not completely block light, and thus transmits only light for any one of the four video frames. Measures must be taken into account.

  First, the configuration of the signal processing unit 110 for adjusting the frame rate will be described.

  FIG. 9 is a block diagram illustrating a configuration of the signal processing unit 110 according to an embodiment of the present invention.

  Referring to FIG. 9, the signal processing unit 110 according to an embodiment of the present invention includes an A / V decoder 111, a scaler 112, and a frame rate converter 113.

  The A / V decoder 111 extracts audio data and video data from the video content signal, and decodes each audio data and video data.

  The scaler 112 is configured to scale the video data to the display screen size. Scaling means multiplying the distribution range by a constant in order to keep the distribution range of pixel values within a preset range. When the preset range is larger than the distribution range of the pixel values of the first video data, the upscaling is performed, and the screen of the upscaling result video data is enlarged at a preset ratio. On the other hand, when the preset range is smaller than the distribution range of the pixel values of the input video data, down-scaling is performed, and the screen of the down-scaling result video data is reduced at a preset ratio. In the case of upscaling, since one pixel value on the input video data can be matched with a plurality of pixel values on the scaling result video data screen, the resolution may be lowered.

  The frame rate converter 113 is configured to convert the frame rate of video data. The frame rate means the number of video frames output per second. The frame rate converter 113 converts the frame rate of the video content so as to match the output rate of the display device 100. For example, when the display apparatus 100 operates at 60 Hz, the frame rate converter can set the frame rate of the video content to 60 Hz. When the number of video frames is small, a new video frame located between them is created using continuous video frames. When the number of video frames is large, a part of the video frames is deleted and matched with the frame rate.

  When the display apparatus 100 provides multi-view or 3D video, the frame rate converter requires a frame rate that is a multiple of single video data. For example, when the left-eye video frame and the right-eye video frame of 3D content are alternately output, the video frame rate of the 3D content can be set to 60 Hz × 2 = 120 Hz. Accordingly, the video frame can be output 120 times per second, and the left eye video frame and the right eye video frame can be alternately output 60 times per second.

  Here, “alternately displaying” means displaying video frames of different contents in a manner of displaying video frames of one content first and then displaying video frames of other content. For example, when the video frames of one content are A, B, C, D,..., Z and the video frames of other content are a, b, c, d,. , B, C, c,..., Z, z.

  In the case of the multi 3D mode, content can be displayed by adjusting the frame rate via the frame rate converter 113. Such an embodiment will be described with reference to FIGS.

  10 to 13 are diagrams illustrating the operation of the glasses apparatus according to the display operation of the first to fourth video frames according to an embodiment of the present invention in the multi 3D mode, respectively.

  Referring to FIG. 10, a left-circularly polarized channel 1 left-eye image (a) is output through the first region 131 of the pattern retarder 130 of the display apparatus 100 in the first image frame, and is output through the second region 132. The right circularly polarized black image (b) is output. Assume that all images were initially linearly polarized with the same horizontal optical axis. It is assumed that the liquid crystal cell passes light as it is when the voltage is on, and delays the phase by a half wavelength (rotates the optical axis by 90 degrees) when the voltage is turned off. Of course, depending on the embodiment, the operation can be reversed. It is assumed that the rear polarizers 253-1 and 263-1 block light having a polarization component in the vertical direction. Obviously, depending on the embodiment, the opposite may occur.

  At this time, the left eye shutter glass retarder 251-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in the opposite direction to the first region 131 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. The channel 1 left eye image (a) that has passed through the left eye shutter glass retarder 251-1 returns to linear polarization again. On the other hand, the retarder 251-1 for the left-eye shutter glass passes through the retarder 251-1 for the left-eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the second region 132 of the pattern retarder unit 130. Since the black image (b) is further delayed by 1/4 wavelength and the optical axis is rotated by 90 degrees, the black image (b) is changed to linearly polarized light in the vertical direction.

  Since the left eye shutter glass liquid crystal cell 252-1 of the glasses device 200-1 of the viewer 1 is in the ON state, the horizontally polarized channel 1 left eye image and the vertically polarized black image are transmitted as they are. Since the rear polarizer 253-1 blocks light having a polarization component in the vertical direction, only the channel 1 left eye image (a) finally reaches the left eye.

  On the other hand, the right eye shutter glass retarder 261-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in the opposite direction to the second region 132 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. Therefore, the black image (b) that has passed through the retarder 261-1 of the right-eye shutter glass returns to the linear polarization in the horizontal direction again. On the other hand, the retarder 261-1 for the right eye shutter glass passes through the retarder 261-1 for the right eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the first region 131 of the pattern retarder unit 130. The channel 1 left eye image (a) is further delayed by 1/4 wavelength and the optical axis is rotated by 90 degrees, so that it is changed to linearly polarized light in the vertical direction.

  Since the liquid crystal cell 262-1 of the right eye shutter glass of the glasses device 200-1 of the viewer 1 is in the ON state, the horizontally polarized black image (b) and the vertically polarized channel 1 left eye image (a) are displayed. Make it transparent. Since the rear polarizer 263-1 blocks light having a vertical polarization component, only the black image (b) finally reaches the right eye.

  Therefore, the viewer 1 wearing the glasses apparatus 200-1 can view only the channel 1 left-eye image through the left eye and can view only the black image through the right eye.

  The glasses device 200-2 of the viewer 2 also operates in a manner similar to the glasses device 200-1 of the viewer 1. The viewer 2 wearing the glasses device 200-2 views only the black video through the left eye and the right eye.

  Referring to FIG. 11, a left-polarized black image (a) is output through the first region 131 of the pattern retarder 130 of the display apparatus 100 in the first image frame, and the right circle is output through the second region 132. A polarized channel 1 right eye image (b) is output. Assume that all images were initially linearly polarized with the same horizontal optical axis. It is assumed that the liquid crystal cell passes light as it is when the voltage is ON, and delays the phase by 1/2 wavelength when the voltage is OFF. Of course, depending on the embodiment, the operation can be reversed. It is assumed that the rear polarizer 253 blocks light having a polarization component in the vertical direction. Obviously, depending on the embodiment, the opposite may occur.

  At this time, the left eye shutter glass retarder 251-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in the opposite direction to the first region 131 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. The black image (a) that has passed through the left eye shutter glass retarder 251-1 returns to linear polarization again. On the other hand, the retarder 251-1 for the left-eye shutter glass passes through the retarder 251-1 for the left-eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the second region 132 of the pattern retarder unit 130. The right eye image (b) of channel 1 is further delayed by a quarter wavelength and the optical axis is rotated by 90 degrees, so that it changes to linearly polarized light in the vertical direction.

  Since the liquid crystal cell 252-1 of the left eye shutter glass of the glasses device 200-1 of the viewer 1 is in the ON state, the horizontally polarized black image (a) and the vertically polarized channel 1 right eye image (b) are displayed. Make it transparent. Since the rear polarizer 253-1 blocks light having a vertical polarization component, only the black image (a) finally reaches the left eye.

  On the other hand, the right eye shutter glass retarder 261-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in the opposite direction to the second region 132 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. Therefore, the channel 1 right eye image (b) that has passed through the retarder 261-1 of the right eye shutter glass returns to linearly polarized light again. On the other hand, the retarder 261-1 for the right eye shutter glass passes through the retarder 261-1 for the right eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the first region 131 of the pattern retarder unit 130. Since the black image (a) is further delayed by 1/4 wavelength and the optical axis is rotated by 90 degrees, the black image (a) is changed to linearly polarized light in the vertical direction.

  Since the liquid crystal cell 262-1 of the right eye shutter glass of the glasses device 200-1 of the viewer 1 is in the ON state, the horizontally polarized channel 1 right eye image and the vertically polarized black image (a) are transmitted as they are. . Since the rear polarizer 263-1 blocks light having a vertical polarization component, only the right eye image (b) of channel 1 finally reaches the right eye.

  Therefore, the viewer 1 wearing the glasses device 200-1 can watch only the black video (a) through the left eye and can watch only the channel 1 right eye video (b) through the right eye.

  The glasses device 200-2 of the viewer 2 also operates in a manner similar to the glasses device 200-1 of the viewer 1. The viewer 2 wearing the glasses device 200-2 views only the black video (a) through the left eye and the right eye.

  12 and 13 also operate in the same manner as the principle described above.

  In FIG. 12, in the third video frame, channel 1 left-eye video (a) is displayed in the first area, and block video (b) is displayed in the second area. At this time, the left and right eyes of the glasses device 200-1 of the viewer 1 watch the black video (b), and the left-eye shutter glasses of the glasses device 200-2 of the viewer 2 transmit the channel 2 left-eye video (a). The right eye shutter glass transmits the black image (b).

  In FIG. 13, in the fourth video frame, a black video (a) is displayed in the first area, and a channel 2 right-eye video (b) is displayed in the second area. At this time, the left eye shutter glasses of the glasses device 200-1 of the viewer 1 transmit the black image (a), and the left eye shutter glasses of the glasses device 200-2 of the viewer 2 transmit the black image (a). The right eye shutter glass transmits the channel 2 right eye image (b).

  As in the above-described example, in the case of the multi 3D mode, the frame rate must be increased, and it is necessary to drive the liquid crystal cells differently according to the display timing of each video frame. That is, it is necessary to synchronize the display device 100 and the glasses device 200.

  FIG. 14 is a diagram illustrating a driving voltage of the liquid crystal cell.

  Referring to FIG. 14, a voltage is applied to the left eye shutter glass portion of the viewer 1 in the first video frame, a voltage is applied in the second video frame, and no voltage is applied in the third video frame. It can be seen that a series of voltage driving is repeated by applying a voltage in the fourth video frame.

  The right eye shutter glass portion of the viewer 1 applies a voltage from the first video frame to the third video frame, and does not apply a voltage in the fourth video frame, and such a series of voltage driving is repeated.

  The left-eye shutter glass portion of the viewer 2 does not apply a voltage in the first video frame, but applies a voltage from the second video frame to the fourth video frame, and such a series of voltage driving is repeated.

  The left-eye shutter glass portion of the viewer 2 is not applied with voltage in the first video frame, is not ignited with voltage in the second video frame, and is applied with voltage in the third and fourth video frames. A series of voltage driving is repeated.

  As described above, when a black image is inserted into a video frame for display, there is an effect that cross talk can be effectively blocked.

  As described above, there is an effect of reducing crosstalk, and even in the multi 2D mode, it is possible to consider a method of inserting and displaying a black video. Since it is the same as the principle of the present invention described above, a brief description will be given below.

  15 to 18 are diagrams illustrating the operation of the glasses apparatus according to the display operation of the first to fourth video frames according to another embodiment of the present invention in the multi 2D mode, respectively.

  In FIG. 15, the left-circularly polarized channel 1 odd image (a) is output via the first region 131 of the pattern retarder unit 130 of the display apparatus 100 in the first video frame, and the right circle is output via the second region 132. A polarized black image (b) is output. Assume that all images were initially linearly polarized with the same horizontal optical axis. It is assumed that the liquid crystal cell passes the optical axis as it is when the voltage is ON, and rotates the optical axis 90 degrees (phase 1/2 wavelength delay) when the voltage is OFF. Of course, depending on the embodiment, the operation can be reversed. In this case, when the rear polarizer 253-1 of the left eye shutter glass part and the rear polarizer 263-1 of the right eye shutter glass part of the glasses device 200-1 of the viewer 1 block light having a vertical polarization component. Assume. It may also be the opposite, depending on the embodiment, and it may be possible to block light in different directions.

  At this time, the left eye shutter glass retarder 251-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in the opposite direction to the first region 131 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. The channel 1 odd image (a) that has passed through the left-eye shutter glass retarder 251-1 returns to linear polarization again. On the other hand, the retarder 251-1 for the left-eye shutter glass passes through the retarder 251-1 for the left-eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the second region 132 of the pattern retarder unit 130. Since the black image (b) is further delayed by 1/4 wavelength and the optical axis is rotated by 90 degrees, the black image (b) is changed to linearly polarized light in the vertical direction.

  Since the liquid crystal cell 252-1 of the left-eye shutter glass of the glasses device 200-1 of the viewer 1 is in the ON state, the horizontally polarized channel 1 odd image (a) and the vertically polarized black image (b) are used as they are. Make it transparent. Since the rear polarizer 253-1 blocks light having a polarization component in the vertical direction, only the channel 1 odd image (a) finally reaches the left eye.

  The right eye shutter glass retarder 261-1 of the eyeglass device 200-1 of the viewer 1 has a phase delay property in a direction opposite to the second region 132 of the pattern retarder unit 130. That is, a 1/4 wavelength phase difference is generated in the opposite direction for the same linearly polarized image. Therefore, the black image (b) that has passed through the retarder 261-1 of the right eye shutter glass returns to linearly polarized light again. On the other hand, the retarder 261-1 for the right eye shutter glass passes through the retarder 261-1 for the right eye shutter glass in order to generate a ¼ wavelength phase difference in the same direction as the first region 131 of the pattern retarder unit 130. The channel 1 odd image (a) is further delayed by 1/4 wavelength and the optical axis is rotated by 90 degrees, so that it is changed to linearly polarized light in the vertical direction.

  Since the liquid crystal cell 262-1 of the right-eye shutter glass of the glasses device 200-1 of the viewer 1 is in the OFF state, the phase of the horizontally polarized black image (b) and the vertically polarized channel 1 odd image (a) is phased. Delay. Since the rear polarizer 263-1 blocks light having a horizontal polarization component, only the odd-numbered channel 1 image (a) finally reaches the right eye.

  Therefore, the viewer 1 wearing the glasses device 200-1 views only the channel 1 odd-numbered video (a) through the left and right eyes, and stops viewing the black video (b).

  The glasses device 200-2 of the viewer 2 also operates in a manner similar to the glasses device 200-1 of the viewer 1. The viewer 2 wearing the glasses device 200-2 views only the black video (b) through the left eye and the right eye.

  FIG. 16 shows the operation of the eyeglass device by the display operation in the case of the second video frame. In the case of FIG. 16, a black image (a) is displayed in the first area, and a channel 1 even image (b) is displayed in the second area. The viewer 1 that operates in a manner similar to FIG. 18 and that wears the glasses device 200-1 views only the channel 1 even region (b) through the left and right eyes, and the viewer 2 that wears the glasses device 200-2 Watch only the black video through your eyes. Here, the channel 1 even video and the odd video are the same video. The same user can view the same video through two consecutive video frames. Particularly, since the display areas of the video are different from each other, the reduction in resolution actually felt by the user is not great. That is, there is a merit of resolution compared to the case where video data is displayed only through odd lines or even lines of the display device 100 described later.

  17 and 18 also operate in the same manner as the principle described above.

  In FIG. 17, in the third video frame, the channel 2 odd video (a) is displayed in the first area, and the black video (b) is displayed in the second area. At this time, the left and right eyes of the glasses device 200-1 of the viewer 1 view the black video (b), and the left and right eye shutter glasses of the glasses device 200-2 of the viewer 2 transmit the channel 2 odd video (a).

  In FIG. 18, in the fourth video frame, a black video (a) is displayed in the first area, and a channel 2 even video (b) is displayed in the second area. At this time, the left and right eye shutter glasses of the eyeglass device 200-1 of the viewer 1 allow the black image (a) to pass, and the left and right eye shutter glasses of the eyewear device 200-2 of the viewer 2 transmit the channel 2 even image (a). .

  However, the embodiment of the drawings is only one embodiment of the present invention, and the voltage can be driven differently. For example, when the polarization directions of the rear polarizers 253 and 263 are different or the retarders 251 and 261 have different phase delay properties, the driving method of the liquid crystal cells 252 and 262 should be changed.

  The operation of the glasses apparatus 200 as described above is related to the display method of the display apparatus 100. In the embodiments described so far, the video data is alternately output to the odd line and the even line of the display panel.

  FIG. 19 is a diagram for explaining the operation of the eyeglass device when the video data changes alternately on the odd / even lines of the pattern retarder.

  As described with reference to the above-described embodiment, when the video data is alternately displayed on the odd / even line of the display apparatus 100, the glasses apparatus 200 operates as shown in FIG. In this case, even if the frame rate increases, the same video is displayed alternately on different lines, and the resolution reduction felt by the user is not great. However, unlike the display apparatus 100, the display apparatus 100 can change and output the video only by the odd line, and can output only the black video from the even line.

  FIG. 20 is a diagram for explaining the operation of the eyeglass device when the video data changes only to the odd line of the pattern retarder.

  As shown in FIG. 20, the display apparatus 100 changes and outputs the video only with the odd line, and outputs only the black video from the even line, or changes and outputs the video only with the even line, and from the odd line. Only black images can be output. In this case, since the display apparatus 100 does not need to display an image in a part of the panel area, there is a merit of low power loss.

  Meanwhile, since it is necessary to synchronize the display timing of the display apparatus 100 and the liquid crystal cell driving of the glasses apparatus 200, the display apparatus 100 must transmit synchronization information to the glasses apparatus 200.

  The communication unit 140 of the display apparatus 100 described above according to an exemplary embodiment of the present invention may include a Bluetooth module, and may transmit the synchronization signal generated by the synchronization signal generation unit 170 to the glasses apparatus 200 through the Bluetooth module. .

  Bluetooth communication technology uses ISM (Industrial Scientific and Medical) 2400 MHz to 2 MHz, 2483.5 MHz to 3.5 MHz except for 2402 to 2480 MHz, a total of 79 channels that transmit data streams in the form of data packets. It refers to a distance wireless communication system.

  FIG. 21 is a diagram illustrating a method for transmitting a synchronization signal to the glasses apparatus 200 using the Bluetooth technology.

  Referring to FIG. 21, when using the Bluetooth communication technology, the glasses device (GA) 200 first searches for a display device to be displayed to be synchronized. And the display apparatus 100 which synchronizes is confirmed according to a search result.

  The process of confirming the display device 100 is performed as follows. The glasses apparatus 200 transmits an inquiry message to the display apparatus 100. The display apparatus 100 receives the inquiry message from the glasses apparatus 200 and listens.

  The display apparatus 100 transmits an EIR packet (Extended Inquiry Response Packet) including a path loss threshold (path loss threshold). At this time, the EIR packet includes information such as a test mode for Bluetooth qualified body test (Test Mode for Bluetooth (registered trademark) Qualification Body Test), a path loss threshold, and the like.

  Then, the glasses apparatus 200 transmits an association notification packet requesting association with the display apparatus 200 to the display apparatus 100 according to the path loss value (path loss). At this time, the glasses apparatus 200 can transmit the association notification packet only when the path loss value is smaller than the path loss threshold.

  When the display apparatus 100 receives an association notification packet requesting association based on a path loss value (path loss) from the glasses apparatus 200, the display apparatus 100 responds to the association notification packet and transmits a baseband ACK to the glasses. Transmit to device 200. That completes the coalition.

  Thereafter, the display apparatus 100 transmits beacon packet transmission timing information including a control signal of the glasses apparatus 200 to the glasses apparatus 200. In such a process, a reconnect train packet including transmission timing information of a beacon packet is transmitted to the glasses apparatus 200, and the glasses apparatus 200 cannot find the reconnect train packet within a preset time. In this case, the process includes a process of receiving a page packet from the glasses apparatus 200. The reconnect train packet is performed without frequency hopping.

  At this time, the beacon packet includes the left shutter open offset or dual view mode video stream 1 (Left shutter open offset (or) Video Stream 1) in addition to the Bluetooth clock (BT clock at rising edge of Frame Sync) at the rising edge of the frame sync. in Dual-View Mode), left shutter cross offset or dual view mode video stream 1 (Left shutter close offset (or) Video Stream 1 in Dual-View Mode), right shutter open offset or dual view mode video stream 2 ( Right shu ter open offset (or) Video Stream 2 in Dual-View Mode), right shutter cross offset or dual-view mode video stream 2 (Right shutter close offset (or) Video Stream 2 in Dual-Video period) Constant / Fraction) (Frame Sync Period (Integrer) / Frame Sync Period (Fraction)) and the like.

  Thereafter, the display apparatus 100 transmits a beacon packet to the glasses apparatus 200 according to the transmission timing information. The glasses apparatus 200 can turn on or off the shutter glasses according to the display timing of the image frame of the content corresponding to itself with reference to the received beacon packet.

  In the above-described embodiment, the display apparatus 100 and the glasses apparatus 200 are described as performing communication using the Bluetooth communication method. However, the present invention is not limited to other short-range communication technologies, that is, infrared communication, Zigbee (registered trademark), A communication channel can be formed by using various short-range communication methods including NFC (NFC).

  For example, the display apparatus 100 may provide the glasses apparatus 200 with an IR (Infra Red) synchronization signal having different frequencies. In this case, the glasses apparatus 200 can receive a synchronization signal having a specific frequency, and turn on or off the shutter glasses according to the display timing of the corresponding content.

  In this case, the communication unit 140 alternates between a high level during the first period and a low level during the second period at a preset time interval based on the synchronization signal. Repeated infrared signals can be transmitted to the eyeglass device 200. The glasses apparatus 200 can be realized such that the shutter glasses are turned on during the first period at the high level and the shutter glasses are turned off during the second period at the low level. In addition, the synchronization signal may be generated by various methods.

  On the other hand, in addition to the synchronization signal described above, an audio signal may be transmitted to the glasses apparatus 200 by the same technical means. That is, in the multi 2D mode and the multi 3D mode, the audio signal of each content can be transmitted to the glasses apparatus 200 by the above method.

  In the above-described embodiment, the method of displaying without changing the frame rate in the case of multi-2D video has been described, but display of multi-2D video using black video is also possible. Hereinafter, such an embodiment will be briefly described.

  On the other hand, in order to control the operation of the glasses apparatus 200, it is necessary to input a user control command. Hereinafter, an embodiment in such a case will be described.

  FIG. 22 is a diagram showing an external configuration of the eyeglass device 200 according to the embodiment of the present invention.

  Referring to FIG. 22, the glasses apparatus 200 according to an embodiment of the present invention further includes an input unit 270 that receives user input.

  The user operates the input unit 270 of the glasses device 200 to input the display mode. That is, the input unit 270 can be operated to set any one of the single 2D mode, the multi 2D mode, the single 3D mode, and the multi 3D mode. The display mode setting signal input through the input unit 270 is transmitted to the display apparatus 100 through the communication unit (not shown) of the glasses apparatus 200.

  At this time, when the display apparatus 100 identifies the display mode and transmits at least one of the synchronization signal and the audio signal according to the identified display mode, the control unit 220 transmits a communication unit (not shown). ) To control power supply to at least one of the first shutter glass part and the second shutter glass part.

  The input unit 270 may be realized by any one of a switch, a button, a touch pad, and a toggle button. FIG. 22 shows an eyeglass device 200 including a switch. As shown in FIG. 22, when two switches 270 are provided, 3D / 2D can be determined through one switch and multi-view / single view can be determined through another switch.

<Display method and glasses device operation method>
Hereinafter, display methods according to various embodiments of the present invention will be described.

  FIG. 23 is a flowchart of a display method according to various embodiments of the present invention.

  Referring to FIG. 23, a display method according to an exemplary embodiment of the present invention includes a step of configuring a video frame according to a display mode (S2310), a step of outputting the configured video frame (S2320), Polarizing the output video frame differently for each region (S2330) and transmitting at least one of a synchronization signal and an audio signal to active glasses capable of viewing the polarized video frame according to a display mode (S2340).

  The display mode includes a 2D single view mode for displaying one 2D content, a 2D multi view mode for displaying a plurality of 2D contents, a 3D single view mode for displaying one 3D content, and a 3D multi display for displaying a plurality of 3D contents. One of the view modes is a display method.

  In the polarization step, the first region of the output image frame may be left-circularly polarized and the second region may be right-circularly polarized.

  When the display mode is the 2D multi-view mode, the first area of the video frame is configured to indicate a first 2D content video, and the second area is configured to indicate a second 2D content video, In the transmission step, an audio signal corresponding to the glasses apparatus can be transmitted to the glasses apparatus.

  When the display mode is the 3D single view mode, the first region of the video frame indicates the left eye image of the 3D content, and the second region indicates the right eye image of the 3D content. A frame may be configured.

  When the display mode is the 3D multi-view mode, the video frame includes a first video frame in which a first area indicates a left-eye video of the first 3D content and a second area indicates a black video; The first area indicates a black image, the second area indicates a second video frame indicating a right eye image of the first 3D content, the first area indicates a left eye image of the second 3D content, and The second area includes a third video frame indicating a black video, the first area includes a black video, and the second area includes a fourth video frame indicating a right-eye video of the second 3D content. The outputting step may sequentially output the first video frame, the second video frame, the third video frame, and the fourth video frame.

  When the display mode is the 3D multi-view mode, the step of transmitting the synchronization signal includes transmitting beacon packet transmission timing information to the glasses apparatus based on a message received from the glasses apparatus. And transmitting the beacon packet to the glasses apparatus according to the transmission timing information.

  Since each step has already been described, repeated description is omitted here.

  FIG. 24 is a flowchart of an operation method of a glasses apparatus according to various embodiments of the present invention.

  Referring to FIG. 24, the method of operating the glasses apparatus according to various embodiments of the present invention includes a step of rotating the optical axis in different directions for the first and second images output from the pattern retarder display device (S2410). And a step of selectively applying power to the first shutter glass and the second shutter glass to change the polarization characteristics of the first image and the second image in which the optical axis is rotated (S2420). Since each step has already been described, repeated description is omitted here.

<Recording medium>
The display device, the glasses device, the display method, and the glasses device operation method described above are realized by a program including an algorithm that can be executed by a computer, and the program is stored in a non-transitory computer readable medium. May be provided stored.

  A non-transitory readable medium is not a medium that stores data only for a short time, such as a register, cache, or memory, but a medium that stores data semipermanently and can be read by a device. means. Specifically, the various applications or programs described above may be provided by being stored in a non-transitory readable medium such as a CD, a DVD, a hard disk, a Blu-ray disc, a USB, a memory card, or a ROM.

  As described above, according to the present invention, both 3D video and multi-view video can be viewed through the operation control of the eyeglass device without changing the lens.

  In the present invention, in the case of multi-view, the sound of each content can be transmitted to the glasses device, and the sound of each content can be listened to by the glasses device.

  Furthermore, a plurality of users can view a plurality of different 3D contents through the eyeglass device in the pattern retarder system.

    The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. It is obvious that a person having ordinary knowledge in the technical field to which the present invention belongs can come up with various changes or modifications within the scope of the technical spirit described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

110 signal processing unit 120 display unit 130 pattern retarder unit 150 control unit 140 communication unit 160 reception unit 110 signal processing unit 120 display unit 130 pattern retarder unit 150 control unit 180 audio output unit 170 synchronization signal generation unit 140 communication unit 251 first Retarder 261 Second retarder 250 First shutter glass 260 Second shutter glass 230 Power supply unit 220 Control unit 230 Power supply unit 220 Control unit

Claims (13)

A first retarder for delaying the phase of the first video and the second video output simultaneously from the display device;
A second retarder that delays the phase of the first video and the second video in a direction different from the first retarder;
A first shutter glass and a second shutter glass that change polarization characteristics of the first image and the second image, respectively, in which the optical axis is rotated, depending on whether power is applied;
And a control unit that controls to selectively apply the power to each of the first shutter glass and the second shutter glass in order to selectively view the first video and the second video. Each of the first shutter glass and the second shutter glass is
When the power is applied, the alignment is switched, and a first liquid crystal cell (Liquid Crystal Cell) and a second liquid crystal that transmit a first image and a second image in which the optical axis is rotated according to the switched alignment. Cell,
The eyeglass device according to claim 1, further comprising: a first polarizer and a second polarizer that respectively polarize images transmitted through the first liquid crystal cell and the second liquid crystal cell. A communication unit for receiving an audio signal from the display device;
The glasses apparatus according to claim 1, further comprising: an audio output unit that outputs the received audio signal. A communication unit for receiving a synchronization signal from the display device;
The controller is
The glasses apparatus according to claim 1, wherein the power supply is controlled to be selectively applied to each of the first shutter glass and the second shutter glass in accordance with the received synchronization signal. When the display device displays a plurality of 2D contents,
The controller is
The control unit is configured to receive an audio signal of 2D content corresponding to the glasses device from among the plurality of 2D content, and to output the received audio signal via the audio output unit. 3. The eyeglass device according to 3. When the display device displays a plurality of 2D contents,
The controller is
2. The eyeglass device according to claim 1, wherein power is supplied to only one of the first shutter glass and the second shutter glass. When the display device displays one 3D content,
The controller is
2. The eyeglass device according to claim 1, wherein power is supplied to or not supplied to both the first shutter glass and the second shutter glass. When the display device displays a plurality of 3D contents,
The controller is responsive to the received synchronization signal.
A first operation and a second operation of applying power to the first shutter glass and the second shutter glass;
A third operation of applying power to the second shutter glass without applying power to the first shutter glass;
5. The eyeglass device according to claim 4, wherein a power supply is applied to the first shutter glasses and a fourth operation in which no power is applied to the second shutter glasses is sequentially controlled. When the display device displays a plurality of 3D contents,
The controller is responsive to the received synchronization signal.
A first operation of applying power to the first shutter glass and the second shutter glass;
A second operation in which no power is applied to the first shutter glass and the second shutter glass;
5. The control according to claim 4, wherein the third operation and the fourth operation of applying power to the second shutter glass are sequentially performed without applying power to the first shutter glass. 6. Glasses device. When the display device displays a plurality of 3D contents,
The controller is
The audio signal of 3D content corresponding to the glasses device among the plurality of 3D content is received, and control is performed so as to output the received audio signal via the audio output unit. 3. The eyeglass device according to 3. An input unit for receiving user input;
The controller is
Identifying a display mode of the display device according to the received user input, and controlling to receive at least one of a synchronization signal and an audio signal according to the identified display mode;
The eyeglass device according to claim 1, wherein control is performed so that the power is selectively applied to each of the first shutter glass and the second shutter glass. In the operation method of the eyeglass device,
Rotating the optical axis of the first video and the second video output from the display device in different directions;
And a method of selectively applying power to the first shutter glass and the second shutter glass to change the polarization characteristics of the first image and the second image in which the optical axis is rotated, respectively. Receiving an audio signal from the display device;
The method of operating a glasses apparatus according to claim 12, further comprising: outputting the received audio signal.

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